<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>左大右小</title>
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/layout3-2.css">
</head>
<body>
<div class="wrapper">
    <div class="header">左(大)右小</div>
    <div class="main">
        <div class="sidebar">
            右
        </div>
        <div class="content">
            内容
        </div>
        <div class="footer">
            页脚
        </div>
    </div>
</div>
</body>
</html>